797866 has 4 divisors (see below), whose sum is σ = 1196802. Its totient is φ = 398932.

The previous prime is 797851. The next prime is 797869. The reversal of 797866 is 668797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668797 = 17 ⋅39341.

It can be written as a sum of positive squares in only one way, i.e., 783225 + 14641 = 885^2 + 121^2 .

It is not an unprimeable number, because it can be changed into a prime (797869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199465 + ... + 199468.

2⁷⁹⁷⁸⁶⁶ is an apocalyptic number.

797866 is a deficient number, since it is larger than the sum of its proper divisors (398936).

797866 is a wasteful number, since it uses less digits than its factorization.

797866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398935.

The product of its digits is 127008, while the sum is 43.

The square root of 797866 is about 893.2334521277. The cubic root of 797866 is about 92.7491602475.

The spelling of 797866 in words is "seven hundred ninety-seven thousand, eight hundred sixty-six".